Functions of resistors CONTD. (TRANSISTOR BIASING)

TRANSISTOR BIASING
One of the functions of a resistor is in biasing the base of a transistor. A transistor basically needs a small base
voltage (>0.6) to make a large voltage flow through its
collector/emitter terminals. But the base of a transistor is
quite vulnerable to high currents, so a resistor is incorporated here to limit the current and provide a safe biasing voltage.

The value of the base resistor of a transistor may be
calculated through the below given formula:
R = (V – 0.6).Hfe / I,
Here